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石脑油汽提分馏塔C-101底循环泵P-102预热的操作步骤如何进行？
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What can we infer from the passage?请根据以下内容回答下面的题目 Normally a student must attend a certain number of courses in order to graduate, and each course which he attends gives him a credit which will be counted towards a degree. In many American universities the total work for a degree consists of thirty-six courses, each lasting for one term. A typical course consists of three classes per week for fifteen weeks; a student will probably attend four or five courses during each term while attending a u- niversity. Normally a student may expect to take four years attending two semesters each year. Of course, they can work for the degree over a longer period. It is also possible for a student to move between one university and another during his degree course, though this is not in fact done as a regular practice. Every course that the student takes will be given a grade, which is recorded and available for the student to show to their prospective employers. All this imposes a constant pressure and strain of work on students. But some students still spare their time to take part in the student affairs. Elections to positions in student organiza- tions arouse much enthusiasm. The effective work of maintaining discipline is usually performed by students who advise the academic authorities. Any student who is thought to have broken the rules, for example, by cheating, has to appear before a student court. With the large numbers of students, the operation of the system does include a certain number of activities. A student who has held one of these positions of authority is much respected and it will be helpful to him later in his career.Normally a student would at least attend __________ classes each week.
请写出卡盒最大容量：（）
简述国际银邮汇款发汇业务资费标准
做现金提前还款交易时所输入的金额为（）。
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